- Remove each spark plug and place each one in a tray by cylinder number. This will help identify and relate any unusual condition to the cylinder involved.
- Brush or air blast dirt away from the well areas before removing spark plugs. CAUTION: Use goggles to protect eyes from debris when applying compressed air to spark plug wells.
- When it comes to replacing your spark plugs, ACDelco offers a full line of Professional, premium aftermarket Spark Plug products. Choose from our Iridium, Double Platinum, RAPIDFIRE Single Platinum, Conventional, Marine, and Outdoor Power Equipment lines depending on your performance needs. Diesel vehicle owners can also get the ACDelco advantage with our high-quality Glow Plugs. ACDelco Professional, premium aftermarket spark and glow plugs fit both GM and non-GM vehicles.
- Grasp the spark plug boot and gently rotate it 90 degrees counterclockwise. Pull the spark plug boot and cable away from the spark plug. If necessary, use a spark plug boot removing tool. DO NOT grab or violently pull spark plug cables.
- Use the correct deep socket size to loosen each spark plug one or two turns. NOTE: To remove spark plugs from aluminum heads, allow the engine to cool. The heat of the engine, in combination with a spark plug that is still hot, may cause the spark plug threads to strip the cylinder head upon removal.
- Apply dielectric grease into the boot area to reduce the chance of exterior tracking on the buttress tower of the spark plug. This grease also promotes a good heat transfer between the spark terminal screw and boot terminal.
- ACDelco Professional Conventional Spark Plugs are designed for reliability and efficient performance, and are the high quality replacement ideal for many vehicles on the road today. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance. They are also available for Marine applications. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function.
ACDelco R42XLS Professional Conventional Spark Plug
- Black Onyx coating helps reduce corrosion
- Copper core provides great heat transfer and helps maximize plug durability
- Ribbed suppressor seal extends resistance and helps prevent spark flash over and misfires
- Nickel-chrome alloy sheathing helps prevent corrosion on center electrode
- Available for use in Marine applications
$3.95
69 in stock69 in stock
| Make | Model | Year |
|---|---|---|
| Alfa Romeo | 2600 | 1962 - 1968 |
| Alfa Romeo | Berlina | 1969 - 1974 |
| Alfa Romeo | Duetto 1600 | 1966 |
| Alfa Romeo | Giulia | 1962 - 1963 |
| Alfa Romeo | Giulia | 1966 |
| Alfa Romeo | Giulia Sprint | 1962 |
| Alfa Romeo | Giulia Sprint | 1966 |
| Alfa Romeo | Giulietta | 1954 - 1958 |
| Alfa Romeo | Giulietta | 1962 - 1963 |
| Alfa Romeo | GT Veloce | 1969 - 1974 |
| Alfa Romeo | GTC | 1964 |
| Alfa Romeo | GTV | 1965 |
| Alfa Romeo | GTZ | 1964 |
| Alfa Romeo | Montreal | 1971 - 1975 |
| Alfa Romeo | Spider | 1969 - 1974 |
| Alvis | TF21 | 1966 - 1967 |
| Audi | 100 | 1989 - 1991 |
| Audi | 100 Quattro | 1989 |
| Audi | 100 Quattro | 1991 |
| Audi | 100 Series | 1969 - 1977 |
| Audi | 200 | 1989 - 1991 |
| Audi | 200 Quattro | 1989 - 1991 |
| Audi | 4000 | 1980 - 1987 |
| Audi | 4000 Quattro | 1984 - 1987 |
| Audi | 5000 | 1978 - 1988 |
| Audi | 5000 Quattro | 1986 - 1988 |
| Audi | 80 | 1988 - 1991 |
| Audi | 80 Quattro | 1988 - 1991 |
| Audi | 90 | 1988 - 1991 |
| Audi | 90 Quattro | 1988 |
| Audi | Coupe | 1981 - 1987 |
| Audi | Fox | 1973 - 1979 |
| Audi | Quattro | 1983 - 1986 |
| Audi | Super 90 | 1969 - 1972 |
| Austin | America | 1968 - 1972 |
| Austin | Healey 100 | 1953 - 1957 |
| Austin | Healey Sprite | 1958 - 1970 |
| Austin | Marina | 1973 - 1975 |
| Austin | Mini | 1960 |
| Austin | Mini | 1963 - 1966 |
| Austin | Mini 850 | 1960 |
| Austin | Mini 850 | 1963 - 1967 |
| Austin | Mini Cooper | 1961 - 1969 |
| Austin | Mini Moke | 1964 - 1966 |
| BMW | 2.8 Bavaria | 1971 |
| BMW | 2000c | 1965 |
| BMW | 2000cs | 1965 - 1966 |
| BMW | 2500 | 1968 - 1971 |
| BMW | 2800 | 1968 - 1974 |
| BMW | 2800CS | 1968 - 1971 |
| BMW | 3.0CS | 1971 - 1974 |
| BMW | 3.0CSi | 1971 - 1974 |
| BMW | 3.0CSL | 1971 |
| BMW | 3.0S | 1971 - 1974 |
| BMW | 3.0Si | 1971 |
| BMW | Bavaria | 1972 - 1974 |
| Buick | Skyhawk | 1984 - 1987 |
| Chevrolet | LUV | 1981 - 1982 |
| Chevrolet | Metro | 1992 |
| Chevrolet | Metro | 1998 - 2000 |
| Chevrolet | S10 | 1982 - 1985 |
| Chevrolet | S10 Blazer | 1983 - 1984 |
| Chevrolet | Spectrum | 1987 - 1988 |
| Chevrolet | Sprint | 1987 - 1992 |
| Chevrolet | Tracker | 1989 |
| Chrysler | Conquest | 1987 - 1989 |
| Chrysler | Daytona | 1993 |
| Daihatsu | Charade | 1989 |
| Dodge | 2000 GTX | 1989 - 1990 |
| Dodge | Challenger | 1978 - 1979 |
| Dodge | Colt | 1971 - 1992 |
| Dodge | Conquest | 1984 - 1986 |
| Dodge | D50 | 1979 - 1982 |
| Dodge | Daytona | 1993 |
| Dodge | Power Ram 50 | 1983 - 1989 |
| Dodge | Raider | 1988 - 1989 |
| Dodge | Ram 50 | 1983 - 1989 |
| Eagle | 2000 GTX | 1991 - 1993 |
| Eagle | Summit | 1989 - 1991 |
| Eagle | Talon | 1990 - 1998 |
| Eagle | Vista | 1988 - 1991 |
| Ferrari | 308 GTB | 1975 - 1980 |
| Ferrari | 308 GTB | 1982 - 1985 |
| Ferrari | 308 GTBi | 1981 - 1982 |
| Ferrari | 308 GTS | 1977 - 1980 |
| Ferrari | 308 GTS | 1982 - 1985 |
| Ferrari | 308 GTSi | 1981 - 1982 |
| Ferrari | 512 BB | 1977 - 1985 |
| Ferrari | Dino 206 GT | 1967 - 1969 |
| Ferrari | Dino 246 GT | 1969 - 1973 |
| Ferrari | Dino 246 GTS | 1972 - 1973 |
| Ferrari | Dino 308 GT4 | 1973 - 1979 |
| Ferrari | GTO | 1984 - 1987 |
| Ferrari | Mondial | 1983 - 1985 |
| Ferrari | Mondial 8 | 1980 - 1985 |
| Fiat | 124 | 1966 - 1969 |
| Fiat | 124 | 1974 - 1983 |
| Fiat | 128 | 1971 - 1979 |
| Fiat | 131 | 1975 - 1978 |
| Fiat | 600D | 1965 - 1967 |
| Fiat | 850 | 1967 - 1973 |
| Fiat | Brava | 1978 - 1981 |
| Fiat | Strada | 1979 - 1982 |
| Fiat | X-1/9 | 1974 - 1983 |
| Ford | Capri | 1962 - 1964 |
| Ford | Cortina | 1965 - 1970 |
| Ford | Escort | 1956 - 1961 |
| Ford | Pinto | 1971 - 1972 |
| Ford | Prefect | 1950 - 1961 |
| Geo | Metro | 1989 - 1997 |
| Geo | Spectrum | 1989 |
| Geo | Storm | 1990 - 1993 |
| Geo | Tracker | 1989 |
| GMC | S15 | 1982 - 1985 |
| GMC | S15 Jimmy | 1983 - 1984 |
| GMC | Tracker | 1989 |
| Honda | 600 | 1969 - 1972 |
| Honda | Accord | 1985 - 1989 |
| Honda | Civic | 1973 - 1979 |
| Honda | Civic | 1985 - 1987 |
| Honda | Prelude | 1984 - 1987 |
| Hyundai | Elantra | 1992 - 1995 |
| Hyundai | Excel | 1986 - 1994 |
| Hyundai | Scoupe | 1991 - 1992 |
| Hyundai | Sonata | 1989 - 1998 |
| Isuzu | Amigo | 1989 |
| Isuzu | I-Mark | 1981 - 1989 |
| Isuzu | Impulse | 1983 - 1989 |
| Isuzu | Pickup | 1981 - 1992 |
| Isuzu | Stylus | 1991 - 1993 |
| Isuzu | Trooper | 1984 - 1987 |
| Jaguar | XJ | 1968 - 1971 |
| Jensen | Healey | 1972 - 1976 |
| Lamborghini | 350GT | 1964 - 1967 |
| Lamborghini | 400GT | 1966 - 1968 |
| Lamborghini | Espada | 1968 - 1978 |
| Lamborghini | Islero | 1968 - 1970 |
| Lamborghini | Jarama | 1970 - 1976 |
| Lamborghini | Miura | 1966 - 1973 |
| Lancia | 2000 | 1969 - 1974 |
| Lancia | Beta | 1976 - 1979 |
| Lancia | Beta | 1981 |
| Lancia | Flaminia | 1957 - 1968 |
| Lancia | Flavia | 1962 - 1969 |
| Lancia | Fulvia | 1963 - 1974 |
| Lancia | Scorpion | 1976 |
| Lancia | Stratos | 1974 |
| Lancia | Zagato | 1979 |
| Lancia | Zagato | 1981 |
| Lotus | Eclat | 1976 - 1979 |
| Lotus | Elan | 1962 - 1975 |
| Lotus | Esprit | 1980 - 1995 |
| Lotus | Europa | 1967 - 1975 |
| Lotus | Seven | 1962 - 1975 |
| Lotus | Super Seven | 1963 - 1968 |
| Maserati | 228i | 1989 - 1990 |
| Maserati | 3500GT | 1957 - 1961 |
| Maserati | 3500GTI | 1962 - 1964 |
| Maserati | 425 | 1986 - 1987 |
| Maserati | 430i | 1990 |
| Maserati | Biturbo | 1983 - 1987 |
| Maserati | Bora | 1971 - 1983 |
| Maserati | Ghibli | 1967 - 1973 |
| Maserati | Indy | 1969 - 1974 |
| Maserati | Khamsin | 1974 - 1979 |
| Maserati | Merak | 1972 - 1982 |
| Maserati | Mexico | 1966 - 1973 |
| Maserati | Mistral | 1963 - 1970 |
| Maserati | Quattroporte | 1963 - 1970 |
| Maserati | Quattroporte | 1979 - 1986 |
| Maserati | Sebring | 1962 - 1966 |
| Maserati | Spyder | |
| Maserati | Spyder | 1990 |
| Mazda | 1200 | 1970 - 1972 |
| Mazda | 1500 | 1967 - 1970 |
| Mazda | 1800 | 1970 - 1971 |
| Mazda | 616 | 1970 - 1972 |
| Mazda | 618 | 1972 - 1973 |
| Mazda | 626 | 1986 - 1987 |
| Mazda | 808 | 1972 - 1977 |
| Mazda | B1600 | 1972 - 1976 |
| Mazda | B1800 | 1977 - 1978 |
| Mazda | GLC | 1977 - 1978 |
| Mazda | Mizer | 1976 - 1977 |
| Mercedes-Benz | 190C | 1960 - 1974 |
| Mercedes-Benz | 190SL | 1963 |
| Mercedes-Benz | 200 | 1966 - 1968 |
| Mercedes-Benz | 219 | 1951 - 1960 |
| Mercedes-Benz | 220 | 1951 - 1966 |
| Mercedes-Benz | 220 | 1968 - 1973 |
| Mercedes-Benz | 220a | 1954 - 1957 |
| Mercedes-Benz | 220b | 1951 - 1965 |
| Mercedes-Benz | 220S | 1954 - 1966 |
| Mercedes-Benz | 220Sb | 1951 - 1965 |
| Mercedes-Benz | 220SE | 1958 - 1966 |
| Mercedes-Benz | 230 | 1966 - 1969 |
| Mercedes-Benz | 230 | 1974 |
| Mercedes-Benz | 230S | 1966 - 1969 |
| Mercedes-Benz | 230SL | 1963 - 1967 |
| Mercedes-Benz | 250 | 1968 - 1973 |
| Mercedes-Benz | 250C | 1969 - 1973 |
| Mercedes-Benz | 250S | 1966 - 1968 |
| Mercedes-Benz | 250SE | 1966 - 1968 |
| Mercedes-Benz | 250SEC | 1966 - 1968 |
| Mercedes-Benz | 250SL | 1966 - 1968 |
| Mercedes-Benz | 280 | 1973 - 1974 |
| Mercedes-Benz | 280C | 1973 - 1974 |
| Mercedes-Benz | 280S | 1968 - 1971 |
| Mercedes-Benz | 280SE | 1968 - 1973 |
| Mercedes-Benz | 280SEL | 1968 - 1973 |
| Mercedes-Benz | 280SL | 1968 - 1971 |
| Mercedes-Benz | 300 | 1961 - 1962 |
| Mercedes-Benz | 300D | 1958 - 1962 |
| Mercedes-Benz | 300SC | 1956 - 1957 |
| Mercedes-Benz | 300SE | 1961 - 1966 |
| Mercedes-Benz | 300SEL | 1963 - 1973 |
| Mercedes-Benz | 300SL | 1954 - 1963 |
| Mercedes-Benz | 350SL | 1972 - 1973 |
| Mercedes-Benz | 450SE | 1973 - 1974 |
| Mercedes-Benz | 450SEL | 1973 - 1974 |
| Mercedes-Benz | 450SL | 1973 - 1974 |
| Mercedes-Benz | 450SLC | 1973 - 1974 |
| Mercedes-Benz | 600 | 1964 - 1972 |
| Mercury | Capri | 1970 - 1972 |
| MG | 1300 | 1968 - 1969 |
| MG | MGB | 1962 - 1981 |
| MG | MGC | 1968 - 1969 |
| MG | Midget | 1967 - 1974 |
| MG | TF | 1954 |
| Mitsubishi | Cordia | 1983 - 1988 |
| Mitsubishi | Diamante | 1992 - 1996 |
| Mitsubishi | Eclipse | 1990 - 1999 |
| Mitsubishi | Expo | 1992 |
| Mitsubishi | Galant | 1989 - 1994 |
| Mitsubishi | Mighty Max | 1983 - 1996 |
| Mitsubishi | Mirage | 1985 - 1992 |
| Mitsubishi | Montero | 1986 - 1989 |
| Mitsubishi | Precis | 1987 - 1994 |
| Mitsubishi | Starion | 1983 - 1989 |
| Mitsubishi | Tredia | 1983 - 1988 |
| Mitsubishi | Van | 1987 - 1990 |
| Morgan | 4/4 | 1968 - 1974 |
| Morgan | 4/4 | 1980 - 1981 |
| Morgan | 4/4 Series V | 1967 - 1968 |
| Morgan | Plus 8 | 1968 - 1974 |
| Morgan | Plus 8 | 1976 - 1996 |
| Morgan | Plus 8 | 2002 - 2003 |
| Morgan | Plus Four | 1963 - 1974 |
| Morris | Minor | 1963 - 1974 |
| Nissan | 1500 | 1962 - 1965 |
| Nissan | 200SX | 1977 - 1983 |
| Nissan | 240Z | 1970 - 1973 |
| Nissan | 260Z | 1974 - 1975 |
| Nissan | 280ZX | 1980 - 1983 |
| Nissan | 411 | 1967 |
| Nissan | 510 | 1978 - 1981 |
| Nissan | 610 | 1975 |
| Nissan | 620 | 1975 - 1979 |
| Nissan | 710 | 1975 - 1977 |
| Nissan | 720 | 1980 - 1986 |
| Nissan | 810 | 1980 - 1981 |
| Nissan | D21 | 1986 - 1989 |
| Nissan | Maxima | 1981 - 1984 |
| Nissan | Pathfinder | 1987 - 1988 |
| Nissan | Patrol | 1961 - 1969 |
| Nissan | Pulsar NX | 1983 - 1984 |
| Nissan | Sentra | 1987 - 1988 |
| Nissan | Stanza | 1982 - 1983 |
| Opel | Kadett | 1968 |
| Opel | Rallye | 1968 |
| Plymouth | Arrow | 1976 - 1980 |
| Plymouth | Arrow Pickup | 1979 - 1982 |
| Plymouth | Champ | 1979 - 1982 |
| Plymouth | Colt | 1976 - 1992 |
| Plymouth | Conquest | 1984 - 1986 |
| Plymouth | Cricket | 1971 - 1973 |
| Plymouth | Horizon | 1983 |
| Plymouth | Laser | 1990 - 1994 |
| Plymouth | Sapporo | 1978 - 1979 |
| Plymouth | Turismo | 1983 |
| Pontiac | Firefly | 1985 |
| Pontiac | Firefly | 1987 - 1991 |
| Pontiac | Firefly | 1994 - 2000 |
| Pontiac | Grand Am | 1987 - 1989 |
| Pontiac | J2000 Sunbird | 1984 - 1985 |
| Pontiac | Sunbird | 1986 - 1990 |
| Porsche | 911 | 1980 - 1988 |
| Porsche | 914 | 1970 - 1974 |
| Porsche | 924 | 1977 - 1982 |
| Porsche | 924 | 1988 |
| Porsche | 928 | 1984 - 1988 |
| Porsche | 928 | |
| Porsche | 944 | 1985 - 1991 |
| Porsche | 968 | 1992 - 1993 |
| Porsche | 968 | 1995 |
| Renault | Alliance | 1985 - 1987 |
| Renault | Caravelle | 1963 |
| Renault | Encore | 1985 - 1986 |
| Renault | Fuego | 1982 - 1983 |
| Renault | R12 | 1975 - 1977 |
| Renault | R15 | 1974 - 1976 |
| Renault | R17 | 1975 |
| Renault | R17 | 1978 - 1979 |
| Renault | R18i | 1983 |
| Rover | 2000 | 1963 - 1973 |
| Rover | 3500 | 1980 |
| Saab | 900 | 1979 - 1984 |
| Saab | 900 | 1986 - 1988 |
| Saab | 96 | 1969 - 1970 |
| Saab | 99 | 1971 - 1972 |
| Saab | 99 | 1978 |
| Saab | Sonett | 1969 |
| Simca | 1000 | 1962 - 1968 |
| Simca | 1000S | 1963 - 1968 |
| Simca | 1118 | 1969 - 1971 |
| Simca | 1204 | 1969 - 1971 |
| Subaru | 1400 | 1973 - 1974 |
| Subaru | Brat | 1978 - 1987 |
| Subaru | Deluxe | 1972 - 1973 |
| Subaru | DL | 1973 - 1989 |
| Subaru | FE | 1979 |
| Subaru | GF | 1975 - 1979 |
| Subaru | GL | 1972 - 1975 |
| Subaru | GL | 1979 - 1989 |
| Subaru | GL-10 | 1985 - 1989 |
| Subaru | GLF | 1980 - 1982 |
| Subaru | Justy | 1987 - 1995 |
| Subaru | Loyale | 1990 - 1994 |
| Subaru | RX | 1985 - 1989 |
| Subaru | Standard | 1976 - 1987 |
| Subaru | Star | 1970 - 1972 |
| Subaru | XT | 1985 - 1991 |
| Sunbeam | Alpine | 1965 - 1969 |
| Sunbeam | Arrow | 1967 - 1970 |
| Sunbeam | Imp | 1965 - 1967 |
| Sunbeam | Rapier | 1965 - 1970 |
| Suzuki | Forsa | 1985 - 1988 |
| Suzuki | SA310 | 1985 |
| Suzuki | Swift | 1989 - 1997 |
| Triumph | 2000 | |
| Triumph | GT6 | 1967 |
| Triumph | TR250 | 1967 - 1969 |
| Triumph | TR6 | 1968 - 1976 |
| Volkswagen | 411 | 1972 - 1973 |
| Volkswagen | 412 | 1973 - 1974 |
| Volkswagen | Cabriolet | 1985 - 1986 |
| Volkswagen | Cabriolet | 1988 - 1993 |
| Volkswagen | Corrado | 1990 - 1992 |
| Volkswagen | Dasher | 1974 - 1980 |
| Volkswagen | Fox | 1987 - 1993 |
| Volkswagen | Golf | 1985 - 1995 |
| Volkswagen | Jetta | 1980 - 1995 |
| Volkswagen | Passat | 1991 - 1993 |
| Volkswagen | Quantum | 1982 - 1988 |
| Volkswagen | Rabbit | 1975 - 1984 |
| Volkswagen | Rabbit Convertible | 1980 - 1984 |
| Volkswagen | Rabbit Pickup | 1980 - 1983 |
| Volkswagen | Scirocco | 1975 - 1989 |
| Volvo | 740 | 1989 |
| Volvo | 940 | 1991 |
| Yugo | GV | 1988 |
| Yugo | GVL | 1988 |
| Yugo | GVS | 1988 |
| Yugo | GVX | 1987 - 1988 |
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